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Barnes & Noble, the 99-year-old bookstore chain, just can’t seem to find a solution for Amazon, the company’s main rival. The latest retreat came in the United Kingdom, where Barnes & Noble announced it will shut down the Nook e-books store in that country on March 15.

Bacterial levels of the substandard masks, priced from HK0 to 499 per box of 50 pieces, have exceeded the maximum level by 0.4 to 11.5 times, customs said in a statement.

Baikonur Cosmodrome, located in southwestern Kazakhstan's Kyzylorda region, is jointly managed by the Russian space agency Roscosmos and Russia's Aerospace Forces. Russia leases the spaceport until 2050.

Baidu, China's largest search engine, has been developing self-driving software for five years. Its Apollo software system for autonomous vehicles is open-source. Baidu started testing the first version of the software in 2017 on public roads and displayed version 2.0 at CES in Las Vegas in January.

Bai made the remarks at a press conference on the science and technology cooperation between China and B&R countries.